<template>
    <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
        <el-row>
            <el-col>
                <el-button type="primary">添加角色</el-button>
            </el-col>
        </el-row>
        <!-- 角色列表区域 -->
    <el-table :data="rolelist" border stripe>
        <el-table-column type="expand">
            <template slot-scope="scope">
                <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(items1,i1) in scope.row.children" :key="items1.id">
                    <!-- 一级权限区域 -->
                    <el-col :span="5">
                        <el-tag closable @close="removeRightById(scope.row,items1.id)">{{items1.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 二三级全权限区域 -->
                    <el-col :span="19">
                        <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(items2,i2) in items1.children" :key="items2.id">
                            <!-- 二级权限区域 -->
                            <el-col :span="6">
                                <el-tag type="success" closable @close="removeRightById(scope.row,items2.id)">{{items2.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 三级权限区域 -->
                            <el-col :span="18">
                                <el-tag closable type="warning" v-for="(items3) in items2.children" :key="items3.id" @close="removeRightById(scope.row,items3.id)">{{items3.authName}}</el-tag>
                            </el-col>
                        </el-row>
                    </el-col>
                </el-row>
            </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
                <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
            </template>
        </el-table-column>
    </el-table>
    </el-card>
    <!-- 弹出对话框 -->
    <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @closed="setRightDialogClosed">
        <!-- 树形控件 -->
        <el-tree
            :data="rightslist"
            show-checkbox
            node-key="id"
            :props="treeProps"
            :default-expand-all="true"
            :default-checked-keys="defKeys"
            ref="treeRef">
            </el-tree>
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
        </el-dialog>
    </div>
</template>
<script>
export default {
  data () {
    return {
      rolelist: [],
      setRightDialogVisible: false,
      rightslist: [],
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      defKeys: [],
      roleID: ''
    }
  },
  methods: {
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取用户权限失败!')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    async removeRightById (role, rightId) {
      const confirmReault = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmReault !== 'confirm') {
        return this.$message.info('取消了删除!')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      role.children = res.data
    },
    async showSetRightDialog (role) {
      this.roleID = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message('获取权限数据失败！')
      }
      this.rightslist = res.data
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    setRightDialogClosed () {
      this.defKeys.length = 0
    },
    async allotRights () {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleID}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  },
  created () {
    this.getRolesList()
  }
}
</script>
<style scoped lang="less">
.el-tag{
    margin:7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>
